Oxidation of Alcohols with Molecular Oxygen on Solid Catalysts

Mallát, Tamás; Baiker, Alfons

doi:10.1021/cr0200116

Cited by 1,882 publications

(1,131 citation statements)

References 348 publications

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“…[1][2][3][4][5][6] Catalytic activity of the supported catalyst is dependent on not only the size of metal NPs but also the metal-support interaction. [7][8][9][10][11][12][13] Strong metal-support interaction in which metals are anchored on active transition metal oxides such as TiO 2 , 14-19 CeO 2 , 20-24 and Fe 2 O 3 25-27 provides high activity for several reactions such as hydrogenation, [28][29][30] CO oxidation, [31][32][33][34][35] and water-gas shift reaction.…”

Section: Introductionmentioning

confidence: 99%

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Kang¹,

Eum²,

Lee³

et al. 2011

Bulletin of the Korean Chemical Society

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Confined Pt and CoFe 2 O 4 nanoparticles (NPs) in a mesoporous core/shell silica microsphere, Pt-CoFe 2 O 4 @meso-SiO 2 , were prepared using a bi-functional linker molecule. A large number of Pt NPs in Pt-CoFe 2 O 4 @meso-SiO 2 , ranging from 5 to 8 nm, are embedded into the shell and some of them are in close contact with CoFe 2 O 4 NPs. The hydrogenation of cyclohexene over the Pt-CoFe 2 O 4 @meso-SiO 2 microsphere at 25 o C and 1 atm of H 2 yields cyclohexane as a major product. In addition, it gives oxygenated products. Control experiments with 18O-labelled water and acetone suggest that surface-bound oxygen atoms in CoFe 2 O 4 are associated with the formation of the oxygenated products. This oxidation reaction is operative only if CoFe 2 O 4 and Pt NPs are in close contact. The Pt-CoFe 2 O 4 @meso-SiO 2 catalyst is separated simply by a magnet, which can be re-used without affecting the catalytic efficiency.

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Section: Introductionmentioning

confidence: 99%

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Kang¹,

Eum²,

Lee³

et al. 2011

Bulletin of the Korean Chemical Society

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“…[1][2][3] Although there are variable ways to carry out the oxidation reactions, using transition metal catalyst with molecular oxygen is one of the promising systems to achieve productivity and low environmental impact. [4][5][6][7][8] Alcohol oxidation reaction processes with heterogeneous catalysts occur in the gas-solid and liquid-solid interfaces. The reaction rate and product selectivity are significantly affected by the phase 9 and we have studied alcohol oxidation by using size controlled platinum nanoparticles (Pt NPs) and sum-frequency generation (SFG) vibrational spectroscopy techniques.…”

Section: Introductionmentioning

confidence: 99%

Alcohol Oxidation at Platinum–Gas and Platinum–Liquid Interfaces: The Effect of Platinum Nanoparticle Size, Water Coadsorption, and Alcohol Concentration

et al. 2017

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Platinum nanoparticles size range from 1 to 8 nm deposited on mesoporous silica MCF-17 catalyzed alcohol oxidations were studied in the gas and liquid phases. Among methanol, ethanol, 2-propanol and 2-butanol reactions, the turnover frequency increased with Pt nanoparticle size for all the alcohols utilized. The activation energies for the oxidations were 1 almost same among all alcohol species, but higher in the gas phase than those in the liquid phase.Water coadsorption poisoned the reaction in the gas phase, while it increased the reaction turnover rates in the liquid phase. Sum frequency generation (SFG) vibrational spectroscopy studies and DFT calculations revealed that the alcohol molecules pack horizontally on the metal surface in low concentrations and stand up in high concentrations, which affect the dissociation of β-hydrogen of the alcohols as the critical step in alcohol oxidations.

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“…1,2 Many efforts have been devoted to the field with a variety of catalysts been developed such as metal complexes, [3][4][5][6] tetramethylpiperidinyloxide (TEMPO), [7][8][9] heteropoly acids 10,11 and so on. Nevertheless, organic solvents are usually used to promote the reaction process, which is considered to be contrary to the concept of green chemistry.…”

Section: Introductionmentioning

confidence: 99%

“…Facilitated recovery of β-CD and excellent efficiency for selective oxidation of alcohols were achieved. As far as we know, only adsorption property of the material has been studied, 2,26 and it was the first time to use it in oxidation reactions.…”

Section: Introductionmentioning

confidence: 99%

β-Cyclodextrin coated Fe3O4 nanoparticles: a simple preparation and application for selective oxidation of alcohols in water

Zhu¹,

Wang²,

Lu³

2013

J. Braz. Chem. Soc.

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nanopartículas core-shell (Fe 3 O4/SiO 2 /CM-β-CD). O catalisador apresenta elevada atividade na oxidação seletiva de vários álcoois usando NaOCl como oxidante e água como solvente. Foi obtido um processo seletivo na ausência de metal de transição e de fácil separação do catalisador.A magnetically separable catalyst was synthesized via a carbodiimide activation process with β-cyclodextrin functionalized by core-shell nanoparticles (Fe 3 O4/SiO 2 /CM-β-CD). The catalyst presented high activity for selective oxidation of various alcohols with NaOCl as oxidant and water only as the solvent. A substrate-selective and transition metal-free process was achieved with easy separation of the catalyst.

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Oxidation of Alcohols with Molecular Oxygen on Solid Catalysts

Cited by 1,882 publications

References 348 publications

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Alcohol Oxidation at Platinum–Gas and Platinum–Liquid Interfaces: The Effect of Platinum Nanoparticle Size, Water Coadsorption, and Alcohol Concentration

β-Cyclodextrin coated Fe3O4 nanoparticles: a simple preparation and application for selective oxidation of alcohols in water

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Oxidation of Alcohols with Molecular Oxygen on Solid Catalysts

Cited by 1,882 publications

References 348 publications

Confined Pt and CoFe2O4Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Confined Pt and CoFe2O4Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Alcohol Oxidation at Platinum–Gas and Platinum–Liquid Interfaces: The Effect of Platinum Nanoparticle Size, Water Coadsorption, and Alcohol Concentration

&#946;&#45;Cyclodextrin coated Fe3O4 nanoparticles: a simple preparation and application for selective oxidation of alcohols in water

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Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

Confined Pt and CoFe₂O₄Nanoparticles in a Mesoporous Core/Shell Silica Microsphere and Their Catalytic Activity

β-Cyclodextrin coated Fe3O4 nanoparticles: a simple preparation and application for selective oxidation of alcohols in water